"It is really easy to kind of nudge the standard recipe," Sunny says of tweaking a classic how-to in order to get the kind of finished product you're craving in a chocolate chip cookie. Get Katie's recipe for a traditional cookie below, then click through the gallery to check out the complete guide to chocolate chippers.

"If you like a dark brown, crack-y and coarse cookie, then you're going to use only baking soda," Katie says. "But there is a risk to this, because it can leave with you with kind of a soapy taste if [the baking soda] doesn't completely activate." 

"If you like a very light, bright and cakey, smooth cookie, then use only baking powder. These cookies are going to rise more, because the baking powder reacts twice: once when you mix it in and again when you bake it," according to Katie. 

"Brown sugar's a little bit acidic, because it has molasses in it," explains Sunny. "That acid works with the baking soda and the baking powder to create all kinds of air pockets." She adds, "Look at the cookie [and] how it's a little bit more risen. So when you use brown sugar, you're going to end up with a cakier cookie."